There can be different causes for this. Loose or corroded connections either at the house or on the powerlines can cause voltage fluctuations. ... Low voltage due to overloading on the network, loose connections, or too small a conductor wire carrying power to your house may cause dimming of your lights.

Why does my voltage go up and down?

When the battery's state of charge is low, the voltage is raised slightly to quickly put the charge back in. When the state of charge is high, the voltage is lowered slightly to prevent overcharging. If the vehicle has a voltmeter gauge, you may see the voltage move up or down. This is normal.

What does fluctuating voltage mean?

A voltage fluctuation is a regular change in voltage that happen when devices or equipment requiring a higher load are used. ... Rural areas may experience dramatic voltage fluctuations due to the long power lines. These power lines can cause voltage to go down when power usage in the area is high.